May Weather in Delta, United States

Last updated: June 24, 2025

In May, the average temperature in Delta, United States is a pleasant 15°C (60°F). Temperatures can vary widely, with a minimum of -3°C (26°F) and a maximum soaring to 32°C (90°F). Additionally, expect around 26 mm (1.0 in) of precipitation over about 5 days, while the average humidity sits at a comfortable 58%.

May Temperature in Delta

In May in Delta, the average temperature is 15°C (60°F). Maximum temperatures can reach 32°C (90°F) and minimums can dip as low as -3°C (26°F). This variability makes it essential for travelers to pack both light clothing and warmer layers to be prepared for the changing weather.

May Weather in Delta: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Delta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Delta, May typically has an average temperature of 15°C (60°F), with highs reaching up to 32°C (90°F) and lows dropping to around -3°C (26°F).

Data source: Temperature data for Delta generated using information from the Copernicus Climate Change Service.

May Precipitation in Delta

In Delta in May, the precipitation amount is 26 mm (1.0 in) over the course of 5 days.

May Precipitation Trends in Delta

The chart displays monthly precipitation patterns in Delta, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Delta, May typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Delta

In Delta in May humidity is 58%. With an average temperature of 15°C (60°F), this humidity feels like a refreshing embrace, making it comfortable for traveling but requiring light layers and occasional breaks to stay cool and enjoy the scenery.

May Average Humidity in Delta

This chart illustrates the average monthly humidity levels in Delta, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Delta is approximately 58%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Delta

In Delta in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Delta.

Maximum UV Index Levels in Delta for May

The chart shows the monthly maximum UV Index (UVI) for Delta in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Delta typically reaches 11, which falls under the extreme exposure category.

Data source: Delta May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in Delta Compares to Other Months

Weather in Delta varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Delta, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Delta, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	31 mm (1.2 inches)	90%	moderate
February Weather	-1°C (30°F)	42 mm (1.7 inches)	89%	high
March Weather	4°C (40°F)	47 mm (1.8 inches)	81%	very high
April Weather	10°C (50°F)	26 mm (1.0 inches)	74%	very high
May Weather	15°C (60°F)	26 mm (1.0 inches)	58%	extreme
June Weather	22°C (71°F)	11 mm (0.4 inches)	47%	extreme
July Weather	25°C (77°F)	13 mm (0.5 inches)	39%	extreme
August Weather	23°C (74°F)	10 mm (0.4 inches)	39%	extreme
September Weather	19°C (66°F)	20 mm (0.8 inches)	53%	very high
October Weather	9°C (49°F)	36 mm (1.4 inches)	72%	high
November Weather	4°C (39°F)	21 mm (0.8 inches)	84%	moderate
December Weather	-3°C (28°F)	31 mm (1.2 inches)	90%	moderate